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Appendix A: Alarm Verification Concept (AVC)
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Alarm verification proceeds as follows:
●
An alarm event activates local alarming and starts the time T1 for attendance
check.
●
Operating personnel acknowledges alarm event on the panel prior to the expiry
of T1. Acknowledging normally silences local alarming.
If there is no acknowledgement, global alarming is activated after T1 expires.
●
After acknowledgement, the investigation time T2 starts. During time T2
operating personnel investigates the fire location.
–
In the case of a minor incident the operator resets the alarm event at the
nearest operating terminal. The alarming process stops, and no global
alarming is activated.
–
In the event of a fire, the nearest MCP or <Alarm delay off> button on panel
must be pressed.
Global alarming is also activated after T2 expiry if there is no reset.
Manned operation
Manned operation enables the responsible personnel to examine the fire alarm
before initiating the intervention force. This may avoid hassles in case of false
alarms.
Attendance check (T1)
In case of a fire incident, the responsible personnel may acknowledge the alert at
the panel by pressing the acknowledge button (ACK) within time T1. After
acknowledgement, the investigation time T2 starts.
Real 'ALARM' is activated if nobody confirms the alert state within the given time
T1.
Investigation time (T2)
During the investigation time T2 the operating personnel may examine the
indicated source of alarm and check the cause of the alarm:
●
Is it a real fire (MAJOR INCIDENT)?
●
Is it a smoldering waste-paper basket (MINOR INCIDENT)?
●
Has the installation detected a deceptive phenomenon (MINOR INCIDENT)?
In the event of a major incident, the nearest manual call point or <Alarm delay off>
must be pressed. Alarm is then triggered.
The operator may reset the panel for a minor incident or false alarm.
A real alarm is activated if the alarm is not reset within the given time T2.
Allowed time per EN 54-2 is T1 + T2 ≤10 min.
A6V10421795_en--_k
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